How to identify a high quality VIP

How to identify a high quality VIP
- methods and techniques to guarantee high quality in production and application -
Gregor Erbenich
Porextherm Dämmstoffe GmbH
Heisinger Straße 8
D-87437 Kempten
Tel.: +49 (0) 831 / 57 53 60
Fax: +49 (0) 831 / 57 53 63
e-Mail:[email protected]
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
What is the difference between?
vs.
Nobody asks:
How long does it keep vacuum?
How can I control the vacuum?
Does it work properly?
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
What determines the quality of a VIP?
main parameters
Raw materials ⇒ e.g. quality of fumed silica (surface), open cell foam (cell size,
open cell content)
Moisture content of raw materials
Humidity in production and raw material storage facilities
Barrier properties of film
Quality of sealing
Vacuum level
Density of core
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
Quality testing before, during and after production
What can be done? – Who can do it?
Before production
Raw materials ⇒ e.g. quality
of fumed silica, open cell foam
Moisture content of raw
materials
Barrier properties
During production
Humidity in production
vacuum level
quality of sealing
density of core
After production
Before shipment
Visual check
Haptics check
Dimension check
Internal pressure
Thermal conductivity
Producer
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
After shipment
Before use
Visual check Haptics check Dimension check Internal pressure ?
Thermal conductivity ?
Customer
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
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with Vacupor® VIPs
Can VIP quality be measured?
main requirements
Thermal conductivity
Internal pressure
Thermal Conductivity
[mW/(m*K)]
40
fumed silica
35
open cell PU-foam
30
25
open cell PS-foam
20
precipitated silica
15
glass fiber
10
PU-foam without
vacuum
5
0
0,01
0,1
1
10
100
1000
Pressure [mbar]
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
Can VIP-quality be measured?
Overview of test methods for thermal conductivity
Method
Measuring procedure
direct
Guarded hot plate method
Hot box method
What is required to determine thermal
conductivity?
indirect
X
Heat Flow method
Measured parameter
Amount of heat Q
X
X
Temperature difference ∆T
Calibration standard
Heat transfer coefficient U
Insertion of solid bodies
method
X
Heat flow
Calibration (λ vs. p for membrane and λ vs. p
for VIP)
Measurement effusivity
X
Thermal effusivity E
Different parameters
Foil lift-off method
X
Interior gas pressure p
Laser distance measurement
Calibration curve λ vs. p for VIP
Gas pressure sensor
X
Interior gas pressure p
Calibration curve λ vs. p for VIP
Gas volume sensor
X
Gas volume
Oxidisable surface
(only good / bad verdict possible)
Heat Flow comparison method
X
Heat flow
Reference VIPs for calibration curve
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
Main VIP test methods
Guarded hot plate method
Source: LaserComp USA
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
Main VIP test methods
Guarded hot plate method
Function
Energy that flows through the
specimen/sample at defined
surface temperatures (hot and cold
plate) and specimen thickness is
measured.
Thermal conductivity is
calculated out of these values
independently on material and
thickness
Due to extremely low heat flow
through a VIP, stabilization takes
quite long
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
Main VIP test methods
Guarded hot plate method
Advantages
Disadvantages
Very accurate/direct measurement
of thermal conductivity.
All parameters are known or
determined automatically
Very slow. ~ 1 – 1,5 h per
measurement
Nearly no limitation (max. 760 mm
width) of specimen size and
thickness
Not mobile
Expansive devices
(52.000 – 100.000 $)
Easy to handle, comfortable
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
Main VIP test methods
Foil lift-off method
Source: The Vac Company GmbH
Device installed in vacuum chamber
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
External „suction bell“ device
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
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with Vacupor® VIPs
Main VIP test methods
Foil lift-off method
Function
Vacuum chamber
VIP will be placed in evacuation
chamber (or under suction bell)
Pressure inside the chamber will
be reduced until gas pressure
inside the VIP is higher than
pressure inside the chamber
Laser device
pchamber
Foil lift-off will be detected by a
laser device and pressure level will
be determined automatically
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
Barrier film
pVIP
VIP
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Fixing
plate
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Main VIP test methods
Foil lift-off method
Advantages
Disadvantages
Very accurate measurement of
internal pressure with chamber
installed version
Reasonable fast ~ 2 – 5 min (in
vacuum chamber) per
measurement
Nearly no limitation of specimen
size and thickness
Not mobile
„mobile version“ is not really
mobile. Double check necessary
due to adhesion of barrier film to
core
Reasonable expansive
for 100% testing, too slow or
chamber blocked for production
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
Main VIP test methods
Insertion of solid body method
external measurement head
internal sensor disk
30 mm
vacuum panel
source: Va-Q-tec
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
Main VIP test methods
Insertion of solid body method
50
45
40
35
30
25
20
15
10
5
0
0,01
λp
TC - fumed silica
[mW/(m*K)]
TC - fleece
[mW/(m*K)]
Function
0,1
1
10
100
1000
20
18
16
14
12
10
8
6
4
2
0
0,01
0,1
1
10
100
Pressure [mbar]
Pressure [mbar]
λfleece p
p λinsert = λVIP
Measurement can be influenced by:
- Different temperature
- Airflow
- Incomplete surface contact
- Quality of fleece (porosity, density, moisture
content etc.)
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
1000
Result can be influenced by:
- Core quality / formulation
- Density
- Moisture content etc.
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
main VIP test methods
Insertion of solid body method
Advantages
Disadvantages
Fast measurement
defined conditions for
measurement absolutely
necessary
Very accurate measurement of
internal pressure under defined
conditions!
no limitation of specimen
size and thickness
comparable cheap
Calibration curves necessary for
calculate thermal conductivity
value.
not “commercial” available, due
to patent situation
not standardized/normed
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
Interim conclusion
Various methods are available, but …
either
to slow,
to expansive,
too sensitive (temperature etc.),
not mobile
or
fast enough, but …
indirect measurements,
too sensitive (needs defined measurement conditions) not reliable enough
not “free” available
not contact free
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
What would be desirable
The ideal measurement device
Measurement device / sensor for thermal conductivity and inner pressure
very accurate
contact free / remote monitoring
independent of external influences (temperature, airflow etc.)
saved historic values “on board” for serious lifetime calculation
small / light weight
easy to handle
reasonably priced
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
What can be done
Cross-linked quality system
Quality certification
Measurement devices
Customer training
Product protection
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
What can be done
Solutions, to increase quality level and customer confidence
Quality certification ⇒ e.g. ISO 9001
DIN EN ISO 9001:2000
Zertifikat: 01 100 030449
External control of producers ⇒ e.g. compulsory in connection with DIBt
approval Ü-Label
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
What can be done
Solutions, to increase quality level and customer confidence
Quality label ⇒ RAL – VIP quality label
labeling / handling instructions
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
What can be done
Solutions, to increase quality level and customer confidence
panel protection
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
What can be done
Solutions, to increase quality level and customer confidence
panel protection
protection layer – rubber granule mat
protection layer – EPS
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
What can be done
Solutions, to increase quality level and customer confidence
source: Polywert
panel protection
protection layer – XPS
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
protection layer – Polyester fiber mat
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
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What can be done
Solutions, to increase quality level and customer confidence
source: Vaku-Isotherm
panel protection
with PVC-frame
plaster-based sheeting
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
What can be done
Solutions, to increase quality level and customer confidence
training
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
Conclusion
Lot of suitable measurement devices are available, but a very
accurate, robust, reliable, easy to handle and reasonable cheap
system is not available yet.
Quality is not create by measurements but in a serious, controlled
production and production process
Quality can only be obtained by users that are aware of the
sensitivity of the product
Sensitivity of the product can be reduced by intelligent protection
High quality can only be achieved by producers with an
extremely high quality approach and customers/users that know
and respect the limitations of the product.
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs
Thank you for your attention
Gregor Erbenich
Global Marketing Manager
Porextherm Dämmstoffe GmbH
9th International Vacuum Insulation Symposium
The Royal Institution of Great Britain
17 and 18 September 2009
London, UK
Create space – save energy
with Vacupor® VIPs